Apparatus for aerial propulsion.



F. L. BARTELT.

APPARATUS FOR AERIAL PROPULSION.

APPLICATION FILED JULY 23, 1909.

1,001,918. I Patented Aug. 29, 191 1.

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COLUMBIA PLANOGRAPH coqw AsmNuTuN. u. c

P. L. BARTELT; APPARATUS FOR AERIAL PROPULSION.

, APPLIUATION IILBD JULY 23,1909. 1,0013 1 8 Patented Aug. 29, 1911.

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COLUMBIA PLANOGRAPII c0, WASHINGTON, I). c,

F. L. BARTELT.

APPARATUS FOR AERIAL PROPULSION.

APPLIOATION TILED JULY 23,1909.

Patented Aug. 29, 1911.

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COLUMBIA PLANOURAPH cu.,wAsHlNq'rON, D- c.

FRIEDRICH LUDWIG BARTELT, OF CORSTON LODGE, NEAR BRISTOL, ENGLAND.

APPARATUS. FOR AERIAL PROPULSION.

Specification of Letters Patent.

Application filed July 23, 1909.

Patented Aug. 29, 1911. Serial No. 509,189.

To all whom it may concern."

Be it known that I, FRIEDRICH LUDWIG BARTELT, of Corston Lodge, nearBristol, England, gentleman, have invented new and useful Improvementsin Apparatus for Aerial Propulsion, of which the following is aspecification.

The object of the present invention is to provide an improved machinewhich will propel itself and its occupant or occupants in the air.

My invention is applicable to machines which are provided with airsurfaces arranged to move up and down in a circular path (under theimpulse of a motor carried by the machine) with the object of sustainingand propelling the machine in the air.

According to my invention I employ a frame covered with canvas or othersuitable material and above this again one or more similar coveredframes. The covering of the frames is arranged with pockets in such away that these will belly out with the air as the frames are moved in agiven direction and will flatten out when they are moved in a contrarydirection. The frames are carried at the ends of cranks by which aparallel motion in a rotary path is imparted to them and the timing ofthe cranks is such that when one of the frames is moved upward itsneighbor is moved downward so that they alternately approach and departfrom one another to the fullest extent permissible. Rotation is impartedto the cranks by the motor by chains or other suitable gearing.

The road wheels will generally be useful in starting and moving theapparatus about, but as soon as the covered frames are able to actefliciently on the air, the wheels will cease to be driven and themachine will be lifted and propelled by the frame alone.

The steering of the apparatus in the air may be effected by means of asail or by a propeller driven by the motor.

In the accompanying drawing I have shown a portion of a flying machineembodying my present improvements.

Figure l is a side elevation, Fig. 2 is a front view, and Fig. 3 is aperspective view of a detail hereinafter mentioned.

Upon a carriage or base represented by the straight line a is mounted amotor engine of any suitable kind and seats for passengers neither ofwhich are shown. The base also supports a framing b constructed aslightly as possible, preferably of metal tubing. This framing b carriesbearings for crank shafts 0 and (Z and also bearings for the shaft ewhich is driven by the motor and which imparts rotation by means ofchains and sprocket wheels to the crank shafts 0 and d above mentioned.The crank shafts 0 and cl are arranged in pairs as shown in Fig. 2. Theshafts 0 are situated at the right hand end of the machine as seen atFig. 1 and the shafts d at the opposite end. Each pair of shafts workone end of a pair of frames 9 and h by means of oppositely placed cranksz and j, is and Z. The upper frame 9 has pendent rods m and n jointed tothe cranks 11 and iv and the lower frame 72. has supporting rods 0 and pjointed to the cranks y and Z. The frames 9 and h which act aspropellers for the machine are covered with canvas or similar materialarranged to swell out in pockets 9 when moved by the cranks in adownward direction in order to create a temporary strong resistance. Thepockets 9 are not permitted to swell out in the opposite direction andto this end an underlying network .9 or longitudinal wires or theirequivalent are provided as clearly seen in Fig. 3 of the drawings.

1', r are merely stays for increasing the rigidity of the frames 9 andh.

It will be seen that as the crank shafts 0 i and d rotate the frames 9and h are moved by the cranks i j and 70 Z in circular paths in such away that each acts alternately as a propeller giving by the downward andbackward stroke while the pockets are inflated a forward motion to theapparatus. The drawn position shown in Fig. 1 gives the frame it at themoment of completing its downward and backward stroke while the frame 9is on the point of completing its upward or inoperative stroke. It willbe observed that the pockets 9 of the frame [L are distended while thoseof the frame 9 are not so. The dotted positions of Fig. l are thoseassumed by the frames 9 and h at the opposite ends of their strokes.

In the apparatus above described only one pair of propelling frames areprovided. It will be understood however that a greater number may beemployed if desired.

By means of alternately operating propelling frames provided withpockets a sufficient resistance of the air may be created to enable theapparatus to progress independently of the air currents the resistanceof which is usually relied upon to sustain aeroplanes.

No attempt has been made to illustrate steering mechanism which may beof the rudder type with or without a propelling device or fan of thekind already adopted.

In the hereinbefore described apparatus there is a double arrangement ofcranks; that is to say the frames 9 and h are worked from both sides. Ifpreferred however a single set mounted centrally may be employed and thesaid frames 9 and h may be provided with central apertures for the;cranks to work through.

What I claim as my invention and desire to secure by Letters Patent is:

Apparatus for aerial propulsion comprising parallel superposed framesprovided with collapsible air pockets, means for moving said frames inindependent rotary paths and operating means for the frames arranged andtimed so that the frames alternately approach and recede from oneanother, while retaining their parallelism, substantially as described.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

FRIEDRIGH LUDWIG BARTELT.

Witnesses:

ALFRED S. BISHOP, A. D. DINSDALE.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. G.

